Sound-absorbing device for type-writers.



E. BALTZLEY.

SOUND ABSORBING DEVICE FOR TYPE WRITERS. APPLICATION FILED JULY 1. 1907.

956,618. 7 Pgtentea MRy3,1910.

. blows struck by its keys, and thereby A UNITED STATES PATENT OFF-ICE.

EDWIN BALTZLEY, or GLEN EcHo, MARYLAND, ASSIGNOR To tours E. BALTZLEY,or WASHINGTON, DISTRICT or COLUMBIA.

Specification of Letters Patent. 7

, Patented May 3, 1910.

Application filed July 1, 1907. Serial No. 381,708.

To all whom it may concern:

Be it known that I, EDWIN BALTZLEY, of

Glen Echo, in the county of Montgomery, and in the State of Maryland,have invented certain new and useful Improvements in Sound AbsorbingDevices for Type Writers, and do hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying drawings, in which" Figure l is a perspective view of oneem-' bodiment of my invention; Fig. 2 is a perspective view of thetypewriter supporting member of another form of my invention; Fig. 3 isa detail View in vertical section of a portion 'of the form of myinvention in which the part shown in Fig. 2 is employed; Figs. 4 to 8,inclusive, .are detail views of other embodiments of my invention and-Fig. 9 is a perspective view of a frame adapted for use with myinvention for type-.

writers whose bases are of different size.

As is very well known, the o eration of typewriters results in a degree0 noise, produced by the manipulation of the keys and themovement of thepaper carriage, that is" seriously objectionable, and though efl'orts Myinvention consists in the sound. ab-

sorbing means constructed substantially as hereinafter specified andclaimed.

I have found that all the noise produced by the operationof a typewritercan be prac tically eliminated by interposin between the machine and thedesk or stan on which it is mounted a spring support of such construction as to permit slight vertical movement of the typewriter underthe impact of revent the transmission of the blow to the csk withresulting noise the blow being taken up or absorbed-by the springsupport, and so that the typewriter will move laterally slightly underthe shock of the longitudinal movement of the paper carriage, a jar orblow to the desk or stand from this cause beingavoided by being absorbedor taken up in the spring support. This spring supportment-of mypurpose, but an excellent arrangement is Illustrated in Fig. 1, where itconsists of a pair of metal strips 11 to which the typewriter isattached, and which at .may be given various forms for the.attaineachend is attached to the top 2 of the desk or stand, by means of screws orbolts 3 between which ends'and the portion on which the typewriter reststhe stri is bowed or bent in an inverted U-shape orm 4, the leg 5 of theU next the t pewriter being shorter than the other, so til strip onwhich the typewriter restsis su ported above the surface of the desk,wit out any likelihood of its cominginto contact therewith. By reason ofthe bends or Urshapes, as described, the typewriter will movement of thetypewriter underthe shocks or blows administeredto it in operating it,whereby suchshocks or blows are prevented 'from being transmitted to thesupporting desk or table. I

Instead of the one-piece device shown in Fig. 1, the springs at each endof the metal strrpmay' be unconnected, and each directly attached to theframe of the typewriting maat the. portion of the chine, and as shown inFig. 6 the springs may be made of wire bent into proper shape.

To adapt my spring support so that the same support may be fitted foruse with frames whose bases are of various slzes, I employ, as showninFig. 9, a. rectangular frame or plate 6, which is attached toindividual springs, such as those shown In Fig.

3 the late bein thereby yieldin 1y suppbrted iibove the leaf and upon iti s placed the t pewriting machine. Said late is provide with anassortment of ho es 7 to suit the base of frames of different sizes.

As shown in Fig. 2 a metal strip 8 may be em loyed, either elastic orinelastic, andat eac end a coil spring 9 (Flg. 4) may be 1nterposedbetween it and the leaf or othersupport, the coil spring permittinvertical, as well as horizontal, movement the typewriter. The end ofspring 9 opposite that engaging plate 6 bears against the plate 10,provided with holes for its attachment to ithe-leaf, and. a bolt 11connects the two plates and passes through'the coil spring 9.

In Fig. 7 a construction similar to that shown in Fig. 4 is illustrated,excepting that the plate 8 is omitted, and in place thereof, a $091112,which is attached to the typewrltingframe, is employed; and in Fig. 5

the coil spring is shownadapted to a typewriter whose frameis providedwith a foot 13, in which instance the foot has a hole in which is seatedthe shank of a button 14, be-

' tween which button and a bearing piece 15 the spring 9 is interposed.The bearing piece 15 has contact with the desk top.

As shown in Fi 8 the spring device is the same as that ilustrated inFigs. 1 and 3, excepting that each spring device is indein pairs by across bar, but eac directl stasis Having thus described my invention,what ing the shock and sound of the ty e bars and carriage of thetypewriter, a meta. loop having vertical and horizontal resilience,means for attaching it to a desk, and detachable means for attaching itto a typewriter.

A sound absorbing supporting device for typewriters, comprisingtypewriter and desk engaging members, and the device heing bent betweensuch members vertically 'andhorizontally to form legs of unequal length,the longer leg being connected to the desk engaging member.

4. A supporting device for typewriters, consisting of a metal strip bentat its ends to form legs of unequal length at each end, the longer legbeing the desk engaging part.

In testimony that I claim the foregoing I have hereunto set my hand.

EDWIN BALTZLEY.

Witnesses: I

CHAS. J. WmLiAMso'n, 1+. J.

